Added Unit tests for backend/routes/itemRoutes.js using jest, mockingoose and supertest

[Amend37]

Developer: Anthony Mendoza

Pull Request Summary

Added Unit tests for backend/routes/itemRoutes.js using jest, mockingoose and supertest. Decided to use supertest as well because it made it easier to test and I read online it also helps to not miss some integration points where middleware or Express-specific behavior could cause issues.

Make sure to npm i and to run do npm test

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[peterchinh]

Can you add --coverage-report to the test script in package.json. Also, try to add tests for all the requests and achieve a higher coverage for itemRoutes.js if you can.

[Amend37]

added more coverage and most of it is covered although it seems i need to do more testing for the %Branch but decided to focus a little more on the newer task since we have to demo this coming week